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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 35 |
| 3 | 101 |
| 4 | 269 |
| 5 | 685 |
| 6 | 1693 |
| 7 | 4093 |
| 8 | 9725 |
| 9 | 22781 |
| 10 | 52733 |
| 11 | 120829 |
| 12 | 274429 |
| 13 | 618493 |
| 14 | 1384445 |
| 15 | 3080189 |
| 16 | 6815741 |
| 17 | 15007741 |
| 18 | 32899069 |
| 19 | 71827453 |
| 20 | 156237821 |
| 21 | 338690045 |
| 22 | 731906045 |
| 23 | 1577058301 |
| 24 | 3388997629 |
| 25 | 7264534525 |
| 26 | 15535702013 |
| 27 | 33151778813 |
| 28 | 70598524925 |
[1,10,35,101,269,685,1693,4093,9725,22781,52733, 120829,274429,618493,1384445,3080189,6815741, 15007741,32899069,71827453,156237821,338690045, 731906045,1577058301,3388997629,7264534525, 15535702013,33151778813,70598524925] |